robert hughes - pushing the limits of materials testing
DESCRIPTION
Robert Hughes's Engineering Research Writer of the Year presentation to the AEngD annual conference, London, on 26 November 2013TRANSCRIPT
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Potential Impact:
Robert Hughes
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Images courtesy of Google
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Images courtesy of Google
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Images courtesy of Google
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Dangerous
Embarrassing
Expensive
Expensive
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1. Precautionary overhaul…
2. Over engineering…
3. Finding the damage before it causes failure but without damaging the structural integrity of the component…
…Priceless (much cheaper)
…Expensive
…Expensive
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• Easy• Repeatable• Sensitive
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High value manufacturing items◦ Complex geometries
Sub-mm defect detection◦ Difficult materials
Higher background noise
ww
w3
.im
peri
al.ac.u
k/m
estr
uctu
ralinte
gri
ty/re
searc
h
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Decision Threshold(3x Max Noise)
Position along scan axis
Ele
ctr
ical sig
nal Component Rejected
Probe
Defect
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Position along scan axis
Ele
ctr
ical sig
nal
Decision Threshold(3x Max Noise)
Component Accepted
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Coaxial Cable
ECT coil
“Equation of Motion”
Resonant Frequency
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Increasing frequency of Operation
Decision Threshold
Near Electrical Resonance signal enhancement (NERSE)
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Sub-mm Defects
@ 2.5MHz
@ NERSE(3.75 MHz)
A B C D
A B C D
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Detect smaller defects
◦ Greater confidence in structural integrity
◦ Longer lifespans
◦ Greater work efficiency
◦ Redesign to save weight
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